<!-- 其实是Home页面的副本 -->
<template>
  <div class="container">
    <div class="left-board">
      <div class="logo-wrapper">
        <div class="logo">
          <img :src="logo" alt="logo"> Form Generator
          <a class="github" href="https://github.com/JakHuang/form-generator" target="_blank">
            <img src="https://github.githubassets.com/pinned-octocat.svg" alt>
          </a>
        </div>
      </div>
      <el-scrollbar class="left-scrollbar">
        <div class="components-list">
          <div v-for="(item, listIndex) in leftComponents" :key="listIndex">
            <div class="components-title">
              <svg-icon icon-class="component" />
              {{ item.title }}
            </div>
            <draggable
              class="components-draggable"
              :list="item.list"
              :group="{ name: 'componentsGroup', pull: 'clone', put: false }"
              :clone="cloneComponent"
              draggable=".components-item"
              :sort="false"
              @end="onEnd"
            >
              <div
                v-for="(element, index) in item.list"
                :key="index"
                class="components-item"
                @click="addComponent(element)"
              >
                <div class="components-body">
                  <svg-icon :icon-class="element.__config__.tagIcon" />
                  {{ element.__config__.label }}
                </div>
              </div>
            </draggable>
          </div>
        </div>
      </el-scrollbar>
    </div>

    <div class="center-board">
      <div class="action-bar">
        <!--<el-button icon="el-icon-video-play" type="text" @click="run">
          运行
        </el-button>-->
        <el-button icon="el-icon-document-checked" type="text" @click="save">
          保存
        </el-button>
        <el-button icon="el-icon-view" type="text" @click="showJson">
          查看json
        </el-button>
        <el-button class="delete-btn" icon="el-icon-delete" type="text" @click="empty">
          清空
        </el-button>
      </div>
      <el-scrollbar class="center-scrollbar">
        <el-row class="center-board-row" :gutter="formConf.gutter">
          <el-form
            :size="formConf.size"
            :label-position="formConf.labelPosition"
            :disabled="formConf.disabled"
            :label-width="formConf.labelWidth + 'px'"
          >
            <draggable class="drawing-board" :list="drawingList" :animation="340" group="componentsGroup">
              <draggable-item
                v-for="(item, index) in drawingList"
                :key="item.renderKey"
                :drawing-list="drawingList"
                :current-item="item"
                :index="index"
                :active-id="activeId"
                :form-conf="formConf"
                @activeItem="activeFormItem"
                @copyItem="drawingItemCopy"
                @deleteItem="drawingItemDelete"
              />
            </draggable>
            <div v-show="!drawingList.length" class="empty-info">
              从左侧拖入或点选组件进行表单设计
            </div>
          </el-form>
        </el-row>
      </el-scrollbar>
    </div>

    <right-panel
      :active-data="activeData"
      :form-conf="formConf"
      :show-field="!!drawingList.length"
      @tag-change="tagChange"
      @fetch-data="fetchData"
    />

    <form-drawer
      :visible.sync="drawerVisible"
      :form-data="formData"
      size="100%"
      :generate-conf="generateConf"
    />
    <json-drawer
      size="60%"
      :visible.sync="jsonDrawerVisible"
      :json-str="JSON.stringify(formData)"
      @refresh="refreshJson"
    />
    <code-type-dialog
      :visible.sync="dialogVisible"
      title="选择生成类型"
      :show-file-name="showFileName"
      @confirm="generate"
    />
    <input id="copyNode" type="hidden">

    <!-- 保存json对话框 -->
    <el-dialog title="保存为动态表单" :visible.sync="jsonDialog.open" width="40%" append-to-body>
      <el-form ref="json-form" :model="jsonDialog.form" :rules="jsonDialog.rules" label-width="80px">
        <el-row>
          <el-col :span="12">
            <el-form-item label="表单key" prop="formKey">
              <el-input v-model="jsonDialog.form.formKey" placeholder="脚本key" :readonly="ifEdit"/>
            </el-form-item>
          </el-col>
          <el-col :span="12">
            <el-form-item label="标题" prop="formTitle">
              <el-input v-model="jsonDialog.form.formTitle" placeholder="请输入标题" :readonly="ifEdit"/>
            </el-form-item>
          </el-col>
        </el-row>
        <el-form-item label="备注" prop="formDesc">
          <el-input type="textarea" v-model="jsonDialog.form.formDesc" placeholder="请输入备注" />
        </el-form-item>
      </el-form>
      <div slot="footer" class="dialog-footer">
        <el-button type="primary" @click="submitForm">确 定</el-button>
        <el-button @click="cancel">取 消</el-button>
      </div>
    </el-dialog>
  </div>
</template>

<script>
    import axios from 'axios'
    import draggable from 'vuedraggable'
    import {debounce} from 'throttle-debounce'
    import {saveAs} from 'file-saver'
    import ClipboardJS from 'clipboard'
    import render from '@/components/render/render'
    import FormDrawer from './FormDrawer'
    import JsonDrawer from './JsonDrawer'
    import RightPanel from './RightPanel'
    import {formConf, inputComponents, layoutComponents, selectComponents} from '@/components/generator/config.js'
    import {beautifierConf, deepClone, isObjectObject, titleCase} from '@/utils/index'
    import {cssStyle, makeUpHtml, vueScript, vueTemplate} from '@/components/generator/html'
    import {makeUpJs} from '@/components/generator/js'
    import {makeUpCss} from '@/components/generator/css'
    import drawingDefalut from '@/components/generator/drawingDefalut'
    import logo from '@/assets/logo.png'
    import CodeTypeDialog from './CodeTypeDialog'
    import DraggableItem from './DraggableItem'
    import {getDrawingList, getFormConf, getIdGlobal, saveDrawingList, saveIdGlobal} from '@/utils/db'
    import loadBeautifier from '@/utils/loadBeautifier'
    import { getDefByKey, saveDef} from "@/api/openform/generator";

    let beautifier
    const emptyActiveData = { style: {}, autosize: {} }
    let oldActiveId
    let tempActiveData
    let drawingListInDB = getDrawingList()
    const formConfInDB = getFormConf()
    const idGlobal = getIdGlobal()

    export default {
        components: {
            draggable,
            render,
            FormDrawer,
            JsonDrawer,
            RightPanel,
            CodeTypeDialog,
            DraggableItem
        },
        data() {
            return {
                ifEdit: false,
                jsonDialog: {
                    open: false,
                    form: {},
                    rules: {
                        formKey: [
                            { required: true, message: "表单key不能为空", trigger: "blur" }
                        ],
                        formTitle: [
                            { required: true, message: "标题不能为空", trigger: "blur" }
                        ],
                        formDesc: [
                            { required: true, message: "必须填写备注", trigger: "blur" }
                        ]
                    }
                },
                logo,
                idGlobal,
                formConf,
                inputComponents,
                selectComponents,
                layoutComponents,
                labelWidth: 100,
                drawingList: drawingDefalut,
                drawingData: {},
                activeId: drawingDefalut[0].formId,
                drawerVisible: false,
                formData: {},
                dialogVisible: false,
                jsonDrawerVisible: false,
                generateConf: null,
                showFileName: false,
                activeData: drawingDefalut[0],
                saveDrawingListDebounce: debounce(340, saveDrawingList),
                saveIdGlobalDebounce: debounce(340, saveIdGlobal),
                leftComponents: [
                    {
                        title: '输入型组件',
                        list: inputComponents
                    },
                    {
                        title: '选择型组件',
                        list: selectComponents
                    },
                    {
                        title: '布局型组件',
                        list: layoutComponents
                    }
                ]
            }
        },
        computed: {
        },
        watch: {
            // eslint-disable-next-line func-names
            'activeData.__config__.label': function (val, oldVal) {
                if (
                    this.activeData.placeholder === undefined
                    || !this.activeData.__config__.tag
                    || oldActiveId !== this.activeId
                ) {
                    return
                }
                this.activeData.placeholder = this.activeData.placeholder.replace(oldVal, '') + val
            },
            activeId: {
                handler(val) {
                    oldActiveId = val
                },
                immediate: true
            },
            drawingList: {
                handler(val) {
                    this.saveDrawingListDebounce(val)
                    if (val.length === 0) this.idGlobal = 100
                },
                deep: true
            },
            idGlobal: {
                handler(val) {
                    this.saveIdGlobalDebounce(val)
                },
                immediate: true
            }
        },
        mounted() {
        },
        created() {
            const formDefKey = this.$route.params && this.$route.params.formDefKey;//获取传入的数据id
            if(formDefKey){
                this.ifEdit = true;
                getDefByKey(formDefKey).then(res => {//加载表单信息
                    this.jsonDialog.form = res.data;
                    if(res.data && res.data.json){
                        drawingListInDB = JSON.parse(res.data.json).fields;
                        this.drawingList = drawingListInDB;
                        return true;
                    }else{
                        this.drawingList = drawingDefalut;
                        return false;
                    }
                }).then(res => {
                    if(!res) return;
                    this.activeFormItem(this.drawingList[0])
                    if (formConfInDB) {
                        this.formConf = formConfInDB
                    }
                    loadBeautifier(btf => {
                        beautifier = btf
                    });
                });
            }else{
                this.activeFormItem(this.drawingList[0])
                if (formConfInDB) {
                    this.formConf = formConfInDB
                }
                loadBeautifier(btf => {
                    beautifier = btf
                });
            }
        },
        methods: {
            setObjectValueReduce(obj, strKeys, data) {
                const arr = strKeys.split('.')
                arr.reduce((pre, item, i) => {
                    if (arr.length === i + 1) {
                        pre[item] = data
                    } else if (!isObjectObject(pre[item])) {
                        pre[item] = {}
                    }
                    return pre[item]
                }, obj)
            },
            setRespData(component, resp) {
                const { dataPath, renderKey, dataConsumer } = component.__config__
                if (!dataPath || !dataConsumer) return
                const respData = dataPath.split('.').reduce((pre, item) => pre[item], resp)

                // 将请求回来的数据，赋值到指定属性。
                // 以el-tabel为例，根据Element文档，应该将数据赋值给el-tabel的data属性，所以dataConsumer的值应为'data';
                // 此时赋值代码可写成 component[dataConsumer] = respData；
                // 但为支持更深层级的赋值（如：dataConsumer的值为'options.data'）,使用setObjectValueReduce
                this.setObjectValueReduce(component, dataConsumer, respData)
                const i = this.drawingList.findIndex(item => item.__config__.renderKey === renderKey)
                if (i > -1) this.$set(this.drawingList, i, component)
            },
            fetchData(component) {
                const { dataType, method, url } = component.__config__
                if (dataType === 'dynamic' && method && url) {
                    this.setLoading(component, true)
                    axios({
                        method,
                        url
                    }).then(resp => {
                        this.setLoading(component, false)
                        this.setRespData(component, resp.data)
                    })
                }
            },
            setLoading(component, val) {
                const { directives } = component
                if (Array.isArray(directives)) {
                    const t = directives.find(d => d.name === 'loading')
                    if (t) t.value = val
                }
            },
            activeFormItem(currentItem) {
                this.activeData = currentItem
                this.activeId = currentItem.__config__.formId
            },
            onEnd(obj) {
                if (obj.from !== obj.to) {
                    this.fetchData(tempActiveData)
                    this.activeData = tempActiveData
                    this.activeId = this.idGlobal
                }
            },
            addComponent(item) {
                const clone = this.cloneComponent(item)
                this.fetchData(clone)
                this.drawingList.push(clone)
                this.activeFormItem(clone)
            },
            cloneComponent(origin) {
                const clone = deepClone(origin)
                const config = clone.__config__
                config.span = this.formConf.span // 生成代码时，会根据span做精简判断
                this.createIdAndKey(clone)
                clone.placeholder !== undefined && (clone.placeholder += config.label)
                tempActiveData = clone
                return tempActiveData
            },
            createIdAndKey(item) {
                const config = item.__config__
                config.formId = ++this.idGlobal
                config.renderKey = `${config.formId}${+new Date()}` // 改变renderKey后可以实现强制更新组件
                if (config.layout === 'colFormItem') {
                    item.__vModel__ = `field${this.idGlobal}`
                } else if (config.layout === 'rowFormItem') {
                    config.componentName = `row${this.idGlobal}`
                    !Array.isArray(config.children) && (config.children = [])
                    delete config.label // rowFormItem无需配置label属性
                }
                if (Array.isArray(config.children)) {
                    config.children = config.children.map(childItem => this.createIdAndKey(childItem))
                }
                return item
            },
            AssembleFormData() {
                this.formData = {
                    fields: deepClone(this.drawingList),
                    ...this.formConf
                }
            },
            generate(data) {
                const func = this[`exec${titleCase(this.operationType)}`]
                this.generateConf = data
                func && func(data)
            },
            execRun(data) {
                this.AssembleFormData()
                this.drawerVisible = true
            },
            execDownload(data) {
                const codeStr = this.generateCode()
                const blob = new Blob([codeStr], { type: 'text/plain;charset=utf-8' })
                saveAs(blob, data.fileName)
            },
            empty() {
                this.$confirm('确定要清空所有组件吗？', '提示', { type: 'warning' }).then(
                    () => {
                        this.drawingList = []
                        this.idGlobal = 100
                    }
                )
            },
            drawingItemCopy(item, list) {
                let clone = deepClone(item)
                clone = this.createIdAndKey(clone)
                list.push(clone)
                this.activeFormItem(clone)
            },
            drawingItemDelete(index, list) {
                list.splice(index, 1)
                this.$nextTick(() => {
                    const len = this.drawingList.length
                    if (len) {
                        this.activeFormItem(this.drawingList[len - 1])
                    }
                })
            },
            generateCode() {
                const { type } = this.generateConf
                this.AssembleFormData()
                const script = vueScript(makeUpJs(this.formData, type))
                const html = vueTemplate(makeUpHtml(this.formData, type))
                const css = cssStyle(makeUpCss(this.formData))
                return beautifier.html(html + script + css, beautifierConf.html)
            },
            showJson() {
                this.AssembleFormData()
                this.jsonDrawerVisible = true
            },
            download() {
                this.dialogVisible = true
                this.showFileName = true
                this.operationType = 'download'
            },
            run() {
                this.dialogVisible = true
                this.showFileName = false
                this.operationType = 'run';
            },
            copy() {
                this.dialogVisible = true
                this.showFileName = false
                this.operationType = 'copy'
            },
            tagChange(newTag) {
                newTag = this.cloneComponent(newTag)
                const config = newTag.__config__
                newTag.__vModel__ = this.activeData.__vModel__
                config.formId = this.activeId
                config.span = this.activeData.__config__.span
                this.activeData.__config__.tag = config.tag
                this.activeData.__config__.tagIcon = config.tagIcon
                this.activeData.__config__.document = config.document
                if (typeof this.activeData.__config__.defaultValue === typeof config.defaultValue) {
                    config.defaultValue = this.activeData.__config__.defaultValue
                }
                Object.keys(newTag).forEach(key => {
                    if (this.activeData[key] !== undefined) {
                        newTag[key] = this.activeData[key]
                    }
                })
                this.activeData = newTag
                this.updateDrawingList(newTag, this.drawingList)
            },
            updateDrawingList(newTag, list) {
                const index = list.findIndex(item => item.__config__.formId === this.activeId)
                if (index > -1) {
                    list.splice(index, 1, newTag)
                } else {
                    list.forEach(item => {
                        if (Array.isArray(item.__config__.children)) this.updateDrawingList(newTag, item.__config__.children)
                    })
                }
            },
            refreshJson(data) {
                this.drawingList = deepClone(data.fields)
                delete data.fields
                this.formConf = data
            },
            save(){
                this.resetForm("json-form");
                this.jsonDialog.open = true;
            },
            submitForm: function(){
                this.$refs["json-form"].validate(valid => {
                    if (!valid) {//校验表单
                        return;
                    }
                    this.AssembleFormData();
                    this.jsonDialog.form.json = JSON.stringify(this.formData);
                    saveDef(this.jsonDialog.form.formKey, this.jsonDialog.form).then(res => {
                        if(res){
                            this.msgSuccess(res.msg);
                            this.jsonDialog.open = false;
                            this.closeSelectedTag();//关闭当前路由
                        }
                    });
                });
            },
            // 取消按钮
            cancel() {
                this.jsonDialog.open = false;
                this.resetForm("json-form");
            },
            closeSelectedTag() {
                let view = this.$router.currentRoute;
                this.$store.dispatch('tagsView/delView', view).then(({ visitedViews }) => {
                    if (this.isActive(view)) {
                        this.toLastView(visitedViews, view)
                    }
                });
            },
            isActive(route) {
                return route.path === this.$route.path
            },
            toLastView(visitedViews, view) {
                const latestView = visitedViews.slice(-1)[0]
                if (latestView) {
                    this.$router.push(latestView.fullPath)
                } else {
                    // now the default is to redirect to the home page if there is no tags-view,
                    // you can adjust it according to your needs.
                    if (view.name === 'Dashboard') {
                        // to reload home page
                        this.$router.replace({ path: '/redirect' + view.fullPath })
                    } else {
                        this.$router.push('/')
                    }
                }
            }
        }
    }
</script>

<style lang='scss'>
  @import 'styles/home';
</style>
